A brief summary of a research article used to help a researcher quickly ascertain the document's purpose.

• A. Abstract
• B. Audio File
• C. Domain
• D. DDC

Answer: (A)

The main idea here is naming the brief summary at the start of a research article and understanding why it’s useful for quickly grasping the document’s purpose. That short summary is called an abstract. An abstract concisely presents the study’s purpose, the methods used, the key findings, and the main conclusions. Because it distills the essential elements of the work, it lets a researcher quickly assess what the article is about and whether it’s relevant to their question, without reading the full paper.

Other terms don’t fit this idea: an audio file is a media format, not a written summary of a study; domain refers to the field or area of study, not a summary of one article; DDC stands for Dewey Decimal Classification, a library system for organizing books, not a summary of research content. In practice, you’ll rely on the abstract during literature searches to decide which articles to open and read in full.